Hoffmann



Jan. 31, 1956 w. HOFFMANN 2,732,683

METHOD AND DEVICE FOR WINDING COPS IN RING-SPINNING AND RING-DOUBLING MACHINES HAVING A VERTICALLY MOVABLE SPINDLE RAIL 2 ShQetS -Sheet 1 Filed June 9, 1951 INVENTOR. Wa/fer Hoffmann.

BY KAY/47A;

ATTOAIVEK 2,732,683 SPINNING VERTICALLY Jan. 31, 1956 w. HOFFMANN METHOD AND DEVICE FOR WINDING COPS IN RING- AND RING-DOUBLING MACHINES HAVING A MOVABLE SPINDLE RAIL 2 Sheets-Sheet 2 Filed Juno 9. 1951 Fig. 3

INVENTOR.

BY It'd 49 Hyman 1 A r roam? United States Patent METHOD AND DEVICE FOR WINDING COPS IN RING-SPINNING AND RING-DOUBLING MA- CHINES HAVING A VERTICALLY MOVABLE SPINDLE RAIL Waiter Hoifmann, Zurich, Switzerland, assignor to Actiengesellschaft Joh. Jacob Rieter & Cie., Winterthur, Switzerland, a corporation of Switzerland Application June 9, 1951, Serial No. 230,722 Claims priority, application Switzerland June 29, 1950 7 Claims. (or. 57-95) The present invention relates to amethod and a device for winding cops, particularly cops of great length.

In conventionalmachines for winding cops, the spindle rail is stationary, the winding stroke being performed by the ring rail. In machines of this type, the balloon de veloping between the thread guide and the traveller on the ring, when winding the base of the cop, is very great, particularly if the cop to be wound is long, and the pull exerted on the thread is also very great. The balloon becomes smaller with increased elevation of the ring rail. The thread on the base of the cop is therefore more tensioned than at the top of the cop. At the top of the cop, the tension of the thread caused by the traveller on the ring exceeds the centrifugal force produced by the balloon. There is less freedom to pull on the thread as the bulge of the balloon becomes smaller, and every minor irregularity causes breaking of the thread. It has been proposed to lower the spindle rail proportionately to the growth of the cop and to limit the move ment of the ring rail to the winding stroke, to equalize the thread tension. In this case, the thread is subjected to maximum tension during the whole period of forming the cop, which is undesired because there is no elasticity left in the thread for subsequent operations. This can be remedied only by reducing the rotational speed of the spindles which is uneconomical. It has been proposed to move the thread guide rail downward together with the spindle rail during formation of the base of the cop, to produce a desirable distance, and thereby a desirable size of balloon, between the thread guide and the ring rail. Such movement of the thread guide rail is limited, because the increase of the free length of the thread between the thread guide and the drawing frame produces other disadvantages, such as the formation of a second balloon which stresses the untwisted yarn coming from the draw ing'frame and causes thread breakage. The thread forms a large loop around the lower cylinder of the drawing frame if the thread guide is too low and twisting is not propagated to the clamp formed by the delivery cylinders and the thread is weak thereat.

It has also been proposed for forming cops of great length to simultaneously move the spindle rail down and the ring rail up. -In this case, the balloon is too long during formation of the base of the cop. The gears and the shifting thereof required for performing thistype of process increase the'cost ofthe machine and of operating it.

It is an object of the present invention'to provide a method and means avoiding the disadvantages set forth above by lowering the thread guide rail synchronously with the spindle rail, during formation of the base of the cop, and by moving the ring rail counter to the spindle rail at a reduced speed-duringformation of the body of the cop, the movement of the ring rail being controlled by that of the spindle rail.

According to the invention, means are-interposed in the conventional chain connection for actuating the ring rail, which means are actuated by the moving spindle rail and responsive to the position thereof for controlling the movement of the ring rail in the manner specified in the paragraph next above.

Further and other objects of the present invention will be hereinafter set forth in the accompanying specification and claims, and shown in the drawing which, by way of illustration, shows what I now consider to be a preferred embodiment of my invention.

In the drawing:

Fig. 1 is a perspective diagrammatic view of the drive head of a ring-spinning machine equipped according to the invention;

Fig. 2 is a diagram illustrating the operation of a modified mechanism according to the invention;

Fig. 3 is an end view, partly in section, of means according to the invention interposed in the chain drive of the ring rail.

Fig. 4 is a longitudinal part sectional view of the means shown in Fig. 3.

Fig. 5 is a diagram illustrating a modification of a portion of the apparatus shown in Fig. 2.

Like parts are designated by like numerals in all figures of the drawings.

Referring more particularly to Fig. l, numeral 1 designates an end wall supporting the drive mechanism of a ring-spinning machine, a frame 2 being connected with Wall 1. From frame 2 extends a spindle rail 3, a ring rail 4, a thread guide rail 40, and a cylinder rail 6. Wall 1 supports gears 7 for driving a conventional drawing frame, not illustrated, and a cam 8. The latter engages a cam follower 11 mounted on a swing lever 10 swinging on pin 9. One end of a chain 13 is connected with a roller 12 at the free end of lever 10. The other end of the chain extends partly around and is connected with roller 14 of a two-roller or pulley transmission 14, 15. A chain 24 extends partly around and has one end connected with pulley 15, the other end of chain 24 extending partly around and being connected with pulley 25 of a double pulley arrangement 25, 26. A chain 27 is laid partly around and is connected with pulley 26 and extends along the whole side of the machine. Chain 27' connected with chain 27 extends over a pulley 28 and carries a transverse member 29 supporting ring rail 4, for example as shown in my Patent Number 2,614,382.

The double pulley arrangement 14, 15 (Figs. 1, 3 and 4) comprises a sleeve portion 16" extending from pulley 15 and being rotatable on shaft or pin 16 and being rotatably mounted in the upper arm of two-arm lever 18. Pin 16 has a cut-out 16'. Roller or pulley 14, which is shrunk on or otherwise rigidly connected with sleeve 16", has a recess or cut-out 30 adapted to receive a cam member or dog 17 which is swingable on pin 31 parallel to the rotation axis of pin 16 and extending into the recess. Cam member 17 has a part, preferably in the form of a follower roller 32, resting against the shaft 16. The chain 13 is laid over the cam member 17 and is made fast on the pulley 14.

Roller 15, which is rigidly and coaxially connected with pulley 14 by means of the sleeve 16 carries a cam 33 displaceable on its circumference and adapted to be fixed in the desired position by means of a screw 33' (Fig. 3). Chain 24 is laid over cam 33 and has an end connected with pulley 15. Cam 33 has an inclined surface 34 changing the extent of movement of chain 24 upon rotation of pulley 15 Shaft or pin 16 is connected with a plate 23 fixed to spindle rail 3, by means of rod 22 whose upper end is slidably connected with a crank arm 21 extending from shaft 16. The connection between rod 22 and plate-23 may be swingable as shown in Fig. l or rigid as shown in Fig. 2. A two-arm lever 18 swings on a stationary pin 3 19. The lower arm of the lever is provided with a pin 20 sliding in a slot in plate 23. Plate 23 has a configuration to suit the structure of the spinning machine with which it is used. Two different forms are shown in Figs. 1 and 2.

The rail 41 carrying thread guides 5 is supported by rods 35 which extend slidably through stationary transverse members 36 and through bores 37 in the spindle rail 3. One only of the rods 35 is shown in Pig. 1. An abutment ring 39 on rod 35 rests on the spindle rail 3 when the latter is in its upper positions causing thread guide rail 41 to move therewith, whereas an abutment ring 38 on rod 35 rests on the transverse member 36 and prevents further lowering of rail 40 when the spindle rail is lowered below a predetermined level.

The aforedescribed device operates as follows:

The power-driven cam 3 is continuously rotated and the follower roller 11 pressed thereto, causing oscillation of swing lever 1-0 whose movements are transmitted through chain 13 to the pulley arrangement 14, 15, therefrom through chain 2 1, roller pair 25, 26, chain 27, and chain 27 to the ring rail 4, raising and lowering the latter. Several pulleys 28 and chains 27 may be provided and the chain 27 may be laid over a pulley 28 and hold a member 29 at the far right end of the machine, not shown. Spindle rail 3 is in uppermost position when the base of the cop is formed. At that time pin 21) is at the lower end of the slot in plate 23 and shaft 16 which is supported by the upper arm of the lever 18 is in its lowest position. Rod 22 lifts crank arm 21 and shaft 16 is in the position shown in Fig. 3 pressing cam member 17 out of recess 30 so that chain 13 is on a greater diameter than that of pulley 14. The angular movement of the latter, upon depression of lever 10, is therefore smaller and the ring rail 4 is lifted less when the base of the cop is formed than if cam member 17 is in recess 30. The spindle rail 3 is continuously lowered by conventional means, not shown. Because of the lowering of the spindle rail, rod 22 connected therewith pulls arm 21 down turning shaft 16 clockwise, so that the follower roller 32 on cam member 17 enters the recess .16 on shaft 16 and member 17 moves deeper into the recess 30. Chain 13 is now on the surface of pulley 14 causing a greater angular movement thereof upon a down-swing of lever and a greater lift of the ring rail after formation of the cop base. Pin moves simultaneously to the left in the slot of plate 23,

causing lever 18 to lift shaft 16. Since the length of chain 13 does not change, pulleys 14, 15 and 25, 26 are turned counter-clockwise, causing chains 27 and 27 to lift ring rail 4 proportionately to the lowering of the spindle rail, however to a lesser extent, due to the difierent lengths of the arms of lever 18. The ring rail is raised while it performs the winding strokes. Since the movements of the ring rail and of the spindle rail are interconnected, a single motion suffices for forming the cop, and construction and operation of the device according to the invention are simple. The thread guide rail 40 is lowered in parallel relation to the spindle rail 3, the adjusting collar 39 resting at first on the spindle rail. After completion of winding of the base of the cop, adjusting collar 38 prevents further downward movement of the thread guides 5 because the collar 38 comes to rest on the stationary bars 36. I

When producing a cylindrical cop, the conicity of the spindle must be compensated for. This is effected by means of the cam 33, Fig. 3, over which rolls the transmission chain 24. The higher the elevation of the ring rail 4, the greater is the counter-clockwise angular displacement of pulley pair 14, 15 and chain 24 comes to lie on the inclined surface portion 34 of the cam 33. The effect of the stroke of lever 10 on chain 24 and parts actuated thereby is therefore gradually reduced and the winding stroke of the ring rail is shortened.

Fig. 2 includes a diagrammatic showing of the relation of movements according to the invention: Ordinate r indicates the downward movement of the spindle rail 3, ordinate s indicates the concurrent upward movement of the ring rail 4, and ordinate 2 indicates the movement of the thread guides 5. The winding stroke changes from a maximum H to a minimum h. The abscissae of the diagrams in Fig. 2 represent the time during which the cop is formed. Line F indicates the time during which the thread guide rail '40 is actuated; its vertical movement is nil after the base of the cop is completed; line AC indicates the upward movement of the ring rail 4, the zigzag line representing the concurrent winding strokes; line R indicates the downward movement of the spindle rail 3.

The advantage obtained by the method and device according to the invention resides in the fact that the length of the balloon formed by the thread during winding of the cop changes only from a value L to a value I at the beginning of the operation, and to a value L when the cop is completed. The size of .the balloon diminishes quickly at the beginning of the formation of the cop, as long as the thread guides are moved downward with the spindle rail and the thread tension is reduced accordingly. The balloon remains sufficiently .large to provide the desired slack in the thread up to completion of the cop. The conditions are favorable during most of the time in which the cop is formed. Since the thread guides are moved only to the extent of the length of the base of the cop, no unfavorable conditions are produced in the thread running above the thread guide.

While I believe the above described embodiment of my invention to be a preferred embodiment, I wish it to be understood that I do not desire to be limited to the exact details of method, design, and construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. In ring-spinning and ring-doubling machines, a vertically movable spindle rail, a vertically movable thread guide rail, means connecting both said rails for simultaneous vertical movement thereof, a swing lever having a free end, a power-driven cam engaging said lever for actuation thereof, a vertically movable ring rail, a shaft, a first pulley, a second pulley rigidly and coaxially connected with the first pulley, said pulleys being rotatably supported by said shaft, a first chain having one end connected with the free end of said swing lever, the other end of said chain being connected with said first pulley and said chain being laid over said first pulley for rotating said pulleys upon movement of said swing lever, a second chain laid over the second pulley and having an end connected therewith, a mechanism connected with said second chain for actuation thereby and being connected with said ring rail for moving it vertically upon winding and unwinding of the second chain on and from said second pulley, and means supporting said shaft and being connected with said spindle rail for displacing said shaft in accordance with thernovements of said spindle rail.

2. 1n ring-spinning and ring-doubling machines as de fined in claim 1, said means supporting said shaft consisting of a two-arm lever swingable about a fixed fulcrum, said pulleys being rotatably supported by one arm of said two-arm lever, the other arm of said two-arm lever being slidably connected with said spindle rail.

3. In ring-spinning and ring-doubling machines as defined in claim 1, a cam on the circumference of said second pulley, said second chain extending over said cam for moving said ring rail at speeds depending on the angular position of said cam, a recess in said first pulley, a cam member movably connected with said first pulley and receivable in said recess, said first chain being laid over said cam member, means connecting said spindle rail and said cam member for moving the latter in and out of said recess for decreasing and increasing the radius on which said first chain acts.

4. In ring-spinning and ring-doubling machines as defined in claim 1, a cam movable on the circumference of said second pulley and means for fixing said cam in the desired position, said second chain extending over said cam for moving said ring rail at a speed depending on the angular position of said cam, a cut-out in said first pulley, said shaft having a recessed and a cylindrical surface portion, and a cam member receivable in said cut-out and swingably connected with said first roller and having a part engaging the surface of said shaft, means connecting said shaft with said spindle rail for rotating said shaft in accordance with the movements of said spindle rail for changing the relative position of said cam member and of said shaft for swinging said cam member into said cut-out when said cam member engages said recessed surface portion of said shaft and for swinging said cam member out of said cut-out when said cam member engages the cylindrical surface portion of said shaft, said first chain extending over said cam member and rotating said pulleys at speeds depending on the position of said cam member.

5. In ring-spinning and ring-doubling machines according to claim 4, said means connecting said shaft with said spindle rail comprising a crank arm extending from said shaft and a rod connecting said arm with said spindle rail.

6. In ring-spinning and ring-doubling machines according to claim 5, the position of the connection of said rod with said arm being adjustable as to the radial distance of the connection from the shaft.

7. In ring-spinning and ring-doubling machines having a vertically movable spindle rail, a vertically movable thread guide rail, and a vertically movable ring rail: stationary guide means disposed below said guide rail, a vertical rod supporting said thread guide rail and slidably extending through said guide means and through said spindle rail, an abutment on said rod between said stationary guide means and said spindle rail to be abutted by the latter for carrying said rod and thread guide rail when said spindle rail is in its upper positions, an abutment on said rod between said thread guide rail and said stationary guide means for resting said rod on the latter when said spindle rail is moved below a predetermined level.

References Cited in the file of this patent UNITED STATES PATENTS 624,148 Allgood May 2, 1899 647,656 Garcelon Apr. 17, 1900 1,913,616 Sailer June 13, 1933 

